Does Staking Ensure 100% Data Integrity? Why or Why Not?

No, staking does not ensure 100% data integrity, but it makes a compromise extremely costly and improbable. Staking is a powerful economic guarantee, but integrity also relies on the quality of the data sources, the robustness of the aggregation logic, and the technical security of the node software.

A coordinated attack involving high-quality external data sources could still bypass the staking mechanism, although this is highly unlikely.